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- /* Error constants. Generic version.
- Copyright (C) 1991-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- /* This file defines the errno constants. */
- #ifndef _BITS_ERRNO_H
- #define _BITS_ERRNO_H 1
- #if !defined _ERRNO_H
- # error "Never include <bits/errno.h> directly; use <errno.h> instead."
- #endif
- #error "Generic bits/errno.h included -- port is incomplete."
- /* Authors of new ports of the GNU C Library must override this file
- with their own bits/errno.h in an appropriate subdirectory of
- sysdeps/. Its function is to define all of the error constants
- from C2011 and POSIX.1-2008, with values appropriate to the
- operating system, and any additional OS-specific error constants.
- C2011 requires all error constants to be object-like macros that
- expand to "integer constant expressions with type int, positive
- values, and suitable for use in #if directives". Moreover, all of
- their names must begin with a capital E, followed immediately by
- either another capital letter, or a digit. It is OK to define
- macros that are not error constants, but only in the implementation
- namespace.
- errno.h is sometimes included from assembly language. Therefore,
- when __ASSEMBLER__ is defined, bits/errno.h may only define macros;
- it may not make any other kind of C declaration or definition.
- Also, the error constants should, if at all possible, expand to
- simple decimal or hexadecimal numbers. */
- #endif /* bits/errno.h. */
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